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Renesas ISL6566IRZA-T
- Part No.:
- ISL6566IRZA-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ISL6566IRZA-T.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,728
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Product details
Overview
ISL6566IRZA-T from Renesas (formerly Intersil) is a three-phase buck PWM controller with integrated high- and low-side MOSFET drivers, designed for precision core voltage regulation in Intel VRM9/VRM10 and AMD Hammer microprocessor power delivery systems. It supports 1–3-phase operation, delivers ±0.5% system accuracy over temperature, uses dual DCR/rDS(ON) current sensing for load-line droop and channel-current balance, and operates up to 1.5 MHz per phase.
For engineers reviewing the ISL6566IRZA-T datasheet, ISL6566IRZA-T pinout, ISL6566IRZA-T application, or ISL6566IRZA-T equivalent, this device is selected for high-efficiency, space-constrained server CPU and high-performance computing power supplies requiring remote sensing, dynamic VID support, and multi-tier overvoltage/overcurrent protection.
Technical Context
The ISL6566IRZA-T implements interleaved three-phase PWM control with adaptive non-overlap timing, programmable switching frequency (via FS pin resistor), and independent per-channel gate drive bias (5–12 V on PVCC pins). Its error amplifier features 96 dB DC gain and 20 MHz gain-bandwidth product for tight transient response.
It integrates a 6-bit VID DAC with selectable Intel VRM9/VRM10 or AMD Hammer encoding, differential remote-sense amplifier (VDIFF output), and dual-path current sensing: lossless inductor DCR sampling (for load line and OCP) and rDS(ON) sampling (for channel-current balancing across all active phases).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | –40°C to +85°C - qualified for industrial-grade CPU power supply environments. |
| System Accuracy | ±0.5% over temp (VID = 1.0–1.85 V) - ensures stable core voltage under thermal stress. |
| Max Switching Freq | 1.5 MHz per phase - enables compact magnetics and high transient response. |
| Current Sensing | DCR + rDS(ON) dual method - separates droop programming (DCR) from channel balance (rDS(ON)). |
| VID Compatibility | Intel VRM9/VRM10 & AMD Hammer - supports legacy and contemporary CPU voltage ID protocols. |
| Gate Drive Voltage | 5–12 V (adjustable via PVCC) - optimizes RDS(ON) and switching loss trade-off for discrete MOSFETs. |
| OCP Threshold | 100 µA at OCSET pin - sets overcurrent trip level with ±7% accuracy using single external resistor. |
Pinout & Package
ISL6566IRZA-T is housed in a 40-lead, 6 mm × 6 mm QFN package (Pb-free, RoHS-compliant) with exposed thermal pad. Pin count and layout match the ISL6566 family's standard L40.6x6 drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID4, VID12.5 | Voltage ID input bits | Encode target output voltage per VRM9/VRM10/AMD Hammer tables; internally pulled up to 1.2 V. |
| UGATE1–3, LGATE1–3 | High-/low-side gate drivers | Direct drive outputs for external N-channel MOSFETs; include shoot-through protection logic. |
| ISEN1–3 | rDS(ON) current sense inputs | Sample lower-FET conduction current for per-phase current balancing; require external RISEN. |
| ISUM, IREF, ICOMP | DCR current sense interface | Form summing node (ISUM), reference point (IREF), and droop amplifier output (ICOMP) for load-line programming. |
| VSEN, RGND | Remote voltage sense inputs | Differential pair connected to CPU VSENSE pins; reject PCB IR drop between regulator and load. |
| ENLL | Enable input | Logic-threshold enable (0.66 V rising); internal 1 µA pull-up to 5 V. |
| FS | Frequency set input | Resistor-to-ground sets oscillator frequency (225–275 kHz base, scalable to 1.5 MHz with multiplier). |
| PGOOD | Power-good indicator | Open-drain output asserted high only when output is within ±5% UV/OV limits post-soft-start. |
Key Features
| Feature | Design Value |
|---|---|
| Dual current sensing | Simultaneous DCR (droop/OCP) and rDS(ON) (channel balance) eliminates need for separate current-sense resistors. |
| Dynamic VID support | Real-time VID code updates during operation enable CPU frequency/voltage scaling without reset. |
| Adjustable voltage offset | OFS pin sinks or sources 50 µA to generate precise positive/negative DC offset (±mV-level) on FB loop. |
| Multi-tier overvoltage protection | Two OV thresholds: fast clamp (125–175 mV above VID) and disable-level (1.62–2.02 V) for layered CPU safety. |
| Phase-count auto-detection | Number of active phases (1/2/3) determined by PVCC2/PVCC3 connection state - no configuration registers required. |
Applications
| Server CPU Power Delivery | Workstation GPU Core Supply |
|---|---|
|
Use Scenario: Regulating 1.0–1.55 V core voltage for dual-socket Xeon or EPYC processors under dynamic 30–120 A loads. IC Role / Device Role / Timing Role: Three-phase PWM controller with integrated drivers, remote sensing, and VID decoding - manages full VRM stage timing and current sharing. Use Value: ±0.5% accuracy and DCR-based droop ensure CPU voltage stays within Intel/AMD spec margins during rapid load transients. |
Use Scenario: Delivering tightly regulated 0.8–1.2 V to high-end GPU cores in professional workstations with thermal throttling requirements. IC Role / Device Role / Timing Role: Multi-phase buck controller implementing interleaved switching and rDS(ON)-based current balancing across three channels. Use Value: Channel-current balance reduces per-MOSFET thermal stress and extends reliability in fanless or low-airflow enclosures. |
| High-Performance Computing Node | Network Processor Power System |
|
Use Scenario: Powering ASIC/FPGA-based compute accelerators requiring <1% voltage deviation under 10–50 A step loads. IC Role / Device Role / Timing Role: Precision voltage regulation IC with differential remote sensing and digital soft-start - maintains stability across long PCB traces. Use Value: VDIFF output combines remote-sense error and DCR droop, enabling accurate closed-loop control without local feedback errors. |
Use Scenario: Providing 1.1–1.35 V core supply to multi-core network processors in telecom line cards with strict EMI and efficiency targets. IC Role / Device Role / Timing Role: Three-phase PWM controller with selectable 225–275 kHz base frequency and up to 1.5 MHz operation - balances efficiency vs. size. Use Value: Programmable FS resistor allows optimization of switching loss vs. inductor/capacitor size for constrained board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-phase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6568IRZ-T | Pin-compatible upgrade with enhanced thermal shutdown (155°C), improved gate drive strength, and extended VID range (0.6–1.85 V). | Supports newer CPU generations requiring tighter accuracy (±0.3%) and higher current density (>150 A). | Select ISL6568IRZ-T for new designs targeting longer product lifecycle and higher power density. |
| RT8803GQW | Three-phase controller with integrated drivers but no DCR sensing - relies on external current-sense resistors for OCP and droop. | Lacks native rDS(ON) channel balancing; requires additional components for equivalent current-sharing performance. | Choose RT8803GQW only if BOM cost reduction outweighs PCB area increase from added sense resistors and op-amps. |
Compared with ISL6566IRZA-T, ISL6568IRZ-T offers higher integration and tighter specs for next-gen CPUs, while RT8803GQW trades integrated sensing for lower unit cost but increases design complexity and component count.
Availability
ISL6566IRZA-T is available at Aetrix Electronics and suitable for server motherboard development, high-performance computing power supplies, and industrial embedded CPU platforms requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL6566IRZA-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics acquired Intersil in 2017 and maintains full technical and supply chain continuity for the ISL6566 family. Renesas is a global semiconductor leader specializing in analog, power, and embedded processing solutions.
The ISL6566 belongs to Renesas' high-performance power management IC portfolio, engineered specifically for advanced microprocessor VRM applications demanding precision regulation, multi-phase efficiency, and robust fault protection.
FAQ
What is the operating temperature range for the ISL6566IRZA-T?
The ISL6566IRZA-T is rated for –40°C to +85°C ambient operation, qualifying it for industrial-grade CPU power delivery applications. This range is confirmed in the "Recommended Operating Conditions" table on page 6 of FN9178 Rev 4.00, and aligns with its "IR" grade designation in the Ordering Information table.
Does the ISL6566IRZA-T support both Intel and AMD microprocessor voltage ID protocols?
Yes, the ISL6566IRZA-T supports Intel VRM9.0, VRM10.0, and AMD Hammer VID protocols. Selection is controlled by the logic states of the VRM10 and VID12.5 pins, as defined in Table 1 on page 12 of FN9178 Rev 4.00. The device decodes up to 6-bit VID codes into precise reference voltages.
How does the ISL6566IRZA-T achieve channel-current balance across three phases?
The ISL6566IRZA-T achieves channel-current balance using rDS(ON) current sensing on each lower MOSFET via ISEN1–3 pins. It samples conduction current every cycle, computes a cycle-average current (IAVG), and adjusts individual PWM pulse widths to minimize error between per-channel current and IAVG - a patented method detailed on pages 11–12 of FN9178 Rev 4.00.
What package type and lead finish does the ISL6566IRZA-T use?
The ISL6566IRZA-T uses a 40-lead, 6 mm × 6 mm QFN package (drawing L40.6x6) with Pb-free (RoHS-compliant) matte tin plating and annealed termination finish. This is explicitly stated in the "Ordering Information" table on page 2 of FN9178 Rev 4.00, where "IRZA-T" denotes the Pb-free tape-and-reel variant.
Can the ISL6566IRZA-T operate in single- or two-phase mode?
Yes, the ISL6566IRZA-T supports 1-, 2-, or 3-phase operation. Phase count is auto-detected: leave PVCC2 and PVCC3 unconnected or grounded for 1-phase; ground only PVCC3 for 2-phase; connect all three PVCC pins for 3-phase. This behavior is documented in the "Functional Pin Description" section on page 8 of FN9178 Rev 4.00.
ISL6566IRZA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, Intel VRM9, VRM10, AMD Hammer Applications
- Voltage - Input:
- 3V ~ 12V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.8V ~ 1.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
ISL6566IRZA-T FAQ
1.How can I place an order for ISL6566IRZA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6566IRZA-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL6566IRZA-T reliable?
The price and inventory of ISL6566IRZA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6566IRZA-T is usually 5 days.
3.What payment methods are accepted for ISL6566IRZA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6566IRZA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6566IRZA-T?
ISL6566IRZA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6566IRZA-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL6566IRZA-T?
For technical support, including ISL6566IRZA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6566IRZA-T requirements.
6.How does Aetrix verify that ISL6566IRZA-T is sourced from the original manufacturer or authorized distributors?
All ISL6566IRZA-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL6566IRZA-T meets industry standards.
7.What is the process for return or replacement of ISL6566IRZA-T?
All ISL6566IRZA-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL6566IRZA-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL6566IRZA-T part is unused and in its original packaging.
Return procedure for ISL6566IRZA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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